Lewes Priory

There were seven religious houses dependent on Lewes. The Monasticon Anglicanum 1825 is a rich source of information on the abbeys and monasteries of England and Wales, albeit before more recent scholarly enquiry. There are entries on all the daughter houses of Lewes Priory.

Priory of Castle Acre, near Swaffham, Norfolk, founded by William de Warenne, 1st Earl of Surrey, about 1087 and dedicated to St Mary. Surrendered to the Crown in 1537. William's wife died at Castle Acre in 1085. It is now an English Heritage property.
Castle Acre website

Castle Acre also had dependent houses:

Priory of Bromholm founded in 1113 by William de Glanvill and dedicated to St Andrew.

Priory of Mendham, Suffolk, was founded by William de Huntingfield before 1155 and dedicated to the Virgin Mary. After the disolution it became a private residence which fell into decay and was eventually demolished in 1815.

Priory of Normansburgh founded about 1160 by William de Liseurs and dedicated to the Blessed Virgin and St John the Evangelist.

Priory of Crabhouse founded about 1181 by Lena, the daughter of Godric de Lynne, as a hermitage which became a nunnery dedicated to the Virgin Mary and St John the Evangelist.

Cell of Slevesholm founded in 1222 by William de Warenne, 3rd Earl of Surrey and dedicated to the the Blessed Virgin and St. Giles.

Hitcham, Norfolk. In 1085 the manor of Heacham was given by William de Warenne to a cell of Cluniac monks from Lewes to pray for the soul of his late wife Gundrada. After the dissolution, around 1541, the manor passed to Thomas Howard, 3rd Duke of Norfolk.
British History Online entry.

Priory of Stanesgate, Steeple, Maldon, Essex, founded between 1086 and 1121 by Ralph, son of Brien, and dedicated to St Mary Magdalen.  It was dissolved in 1525 by an agent of Cardinal Wolsey when there was only the prior and two monks. The church was used as a barn but there is now little remaining above ground.

Priory of Prittlewell, Southend, Essex, founded probably in 1110 and dedicated to the Virgin Mary by Robert fitzSweyn, who had received great land holdings from Edward the Confessor. He later gave the Priory to Lewes. After the dissolution it remained in private hands until it became the first museum of Southend in 1922.
History of Prittlewell Priory

Priory of Farleigh, Monkton Farleigh, near Bath, Somerset, founded probably by Maud, wife of Humphrey de Bohun, in 1120 and dedicated to St Mary Magdalen. At the dissolution there were only six monks and the property passed to the Dukes of Somerset under whose ownership it became Monkton Farleigh Manor.

Clifford Priory, Priory Farm, Clifford, Herefordshire, was founded by Simon Fitz Richard Fitz Ponce in 1129-30. It appears it was never an alien house but owed allegiance to Lewes.

Priory of Horton, near Ashford, Kent, founded about 1144 by Robert de Vere and dedicated to St John the Evangelist. At the dissolution many of the buildings were demolished and the remainder became a private house.